Article ID Journal Published Year Pages File Type
5127325 Journal of Energy Storage 2017 6 Pages PDF
Abstract

•The role of energy storage in promoting renewable energy has been shown.•The solid-state design of supercapacitors has been investigated with ionic liquids.•PPy electrode was synthesized by pulse polymerization.•PPy electrode displayed an area capacitance density of 403.23 mF cm−2.

In this work, solid-state supercapacitors with ionic liquid gel polymer electrolyte and polypyrrole symmetrical electrodes were fabricated and characterized. The ionic liquid 1-butyl-3methylimidazolium tetrafluoroborate (BMIBF4) was mixed with poly (vinylidene fluoridehexafluoropropylene) P(VdF-HFP) to form gel electrolyte. The polypyrrole electrode was prepared by ultra-short pulsed current electro-polymerization over flexible graphite sheets, and was synthesized using LiClO4 and H2SO4 electrolytes. Both electrodes were conditioned by using cyclic voltammetry (CV) for approximately 20 cycles before electrochemical testing. The single electrodes produced maximum area capacitance densities of 403.23 mF cm−2 and 336.08 mF cm−2, synthesized in H2SO4 and LiClO4 electrolytes, respectively at a scan rate of 10 mV s−1. The electrochemical performance of the PPy solid-state supercapacitor was evaluated using CV, CD, and EIS with a maximum area capacitance density of 31.84 mF cm−2 (equivalent to a specific capacitance of 19.9 F g−1)obtained from EIS for the supercapacitor synthesized in H2SO4. The specific energy and specific power were evaluated from CD and were found to be 0.143 Wh kg−1 and 6.39 kW kg−1, respectively at 3 mA cm−2.

Related Topics
Physical Sciences and Engineering Energy Energy (General)
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